551161605077 has 2 divisors, whose sum is σ = 551161605078. Its totient is φ = 551161605076.

The previous prime is 551161605053. The next prime is 551161605103. The reversal of 551161605077 is 770506161155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538226182321 + 12935422756 = 733639^2 + 113734^2 .

It is a cyclic number.

It is not a de Polignac number, because 551161605077 - 2²⁶ = 551094496213 is a prime.

It is a super-2 number, since 2×551161605077² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551161605037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275580802538 + 275580802539.

It is an arithmetic number, because the mean of its divisors is an integer number (275580802539).

Almost surely, 2^551161605077 is an apocalyptic number.

It is an amenable number.

551161605077 is a deficient number, since it is larger than the sum of its proper divisors (1).

551161605077 is an equidigital number, since it uses as much as digits as its factorization.

551161605077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 220500, while the sum is 44.

The spelling of 551161605077 in words is "five hundred fifty-one billion, one hundred sixty-one million, six hundred five thousand, seventy-seven".